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rtl8187: Fix error in setting OFDM power settings for RTL8187L 

After reports of poor performance, a review of the latest vendor driver
(rtl8187_linux_26.1025.0328.2007) for RTL8187L devices was undertaken.

A difference was found in the code used to index the OFDM power tables. When
the Linux driver was changed, my unit works at a much greater range than
before. I think this fixes Bugzilla #12380 and has been tested by at least
two other users.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Martín Ernesto Barreyro <barreyromartin@gmail.com>
Cc: Stable <stable@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2009-01-27 12:31:23 -06:00 committed by John W. Linville
parent e6a271651e
commit eb83bbf574
1 changed files with 8 additions and 2 deletions
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10
drivers/net/wireless/rtl818x/rtl8187_rtl8225.c
View File

@ -285,7 +285,10 @@ static void rtl8225_rf_set_tx_power(struct ieee80211_hw *dev, int channel)
ofdm_power = priv->channels[channel - 1].hw_value >> 4;
cck_power = min(cck_power, (u8)11);
ofdm_power = min(ofdm_power, (u8)35);
if (ofdm_power > (u8)15)
ofdm_power = 25;
else
ofdm_power += 10;
rtl818x_iowrite8(priv, &priv->map->TX_GAIN_CCK,
rtl8225_tx_gain_cck_ofdm[cck_power / 6] >> 1);
@ -536,7 +539,10 @@ static void rtl8225z2_rf_set_tx_power(struct ieee80211_hw *dev, int channel)
cck_power += priv->txpwr_base & 0xF;
cck_power = min(cck_power, (u8)35);
ofdm_power = min(ofdm_power, (u8)15);
if (ofdm_power > (u8)15)
ofdm_power = 25;
else
ofdm_power += 10;
ofdm_power += priv->txpwr_base >> 4;
ofdm_power = min(ofdm_power, (u8)35);